alexa Biphasic effects of geranylgeraniol, teprenone, and phytol on the growth of Staphylococcus aureus.
Chemistry

Chemistry

Natural Products Chemistry & Research

Author(s): Inoue Y, Hada T, Shiraishi A, Hirose K, Hamashima H,

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Abstract We examined the antibacterial activities against Staphylococcus aureus of three diterpenes, namely, geranylgeraniol, teprenone, and phytol, by using a broth dilution with shaking method to identify the effects of diterpenes with long aliphatic carbon chains. We also performed time-kill assays and measured the leakage of K(+) ions from bacterial cells in response to these diterpenes. The diterpenes used inhibited the growth of S. aureus at concentrations of 0.15 microg/ml, as determined by damage to the cell membranes, and had clear bactericidal activity. However, the inhibitory effects of the diterpenes decreased when the concentration of each was raised above a certain level. The diterpenes tested in this study appeared to have both growth-inhibitory and growth-accelerating effects, and the net effect of each depended on its concentration.
This article was published in Antimicrob Agents Chemother and referenced in Natural Products Chemistry & Research

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